readmongo/node_modules/enhanced-resolve/lib/RestrictionsPlugin.js

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Ivan Kopeykin @vankop
*/

"use strict";

const slashCode = "/".charCodeAt(0);
const backslashCode = "\\".charCodeAt(0);

const isInside = (path, parent) => {
	if (!path.startsWith(parent)) return false;
	if (path.length === parent.length) return true;
	const charCode = path.charCodeAt(parent.length);
	return charCode === slashCode || charCode === backslashCode;
};

module.exports = class RestrictionsPlugin {
	constructor(source, restrictions) {
		this.source = source;
		this.restrictions = restrictions;
	}

	apply(resolver) {
		resolver
			.getHook(this.source)
			.tapAsync("RestrictionsPlugin", (request, resolveContext, callback) => {
				if (typeof request.path === "string") {
					const path = request.path;

					for (let i = 0; i < this.restrictions.length; i++) {
						const rule = this.restrictions[i];
						if (typeof rule === "string") {
							if (!isInside(path, rule)) {
								if (resolveContext.log) {
									resolveContext.log(
										`${path} is not inside of the restriction ${rule}`
									);
								}
								return callback(null, null);
							}
						} else if (!rule.test(path)) {
							if (resolveContext.log) {
								resolveContext.log(
									`${path} doesn't match the restriction ${rule}`
								);
							}
							return callback(null, null);
						}
					}
				}

				callback();
			});
	}
};